Building-block.



No Drawing.

SEBASTIANO RANNO FU' BIAGIO, OF NEW YORK, N. Y.

BUILDING-B110 CK.

memes. I

Specification of Letters Patent.

Application filed July 30, 1912.

Patented Deco 1d, 1913.

Serial No.' 712,358.

I To all whom it mag concern:

Be it known that I, SEBASTIANO RANNo FU BIAGIO, a citizen of the UnitedStates, residing at'New York, in the county of New York and State of NewYork, have invented certain new and useful Improvements inBuilding-Blocks, of which the following'is a specification.

My invention relates to blocks ada ted for use in buildings, paving andthe like, and has for its object the provision of an improved block andthe composition thereof by which the block is of a glazed character andexceedingly hard and tough, and likewise practically impervious to fire.

In making my improved block I use pulverized granite 20 parts,pulverized glass 10 parts, and parts eachaof fire clay and red claythoroughly mixed together and fused by means of heat, the temperature towhich the ingredients are subjected being upward of 1500 degreesFahrenheit. Prior to baking the blocks I mix with the clay, pulverizedgranite and glass, (1%) one per cent. of

the entire mixture of bicarbonate of soda;

It will be understood that the bicarbonate of soda forms a flux toassist in the melting of the pulverized granite and pulverized glass,as'well as lowering the fusing point of the other ingredients, and thatthe pulverized granite and the pulverized glass render the blocks whenfinished very durable and furthermore, gives the blocks a glazed andornamental appearance, while the red clay after being baked asheretofore stated turns the mass to a black color, and the fire claymakes the blocks impervious to heat of less than 1500 degreesFahrenheit. It will also be'understood that by the use of bicarbonate ofsoda a block is made that is exceptionally hard and tough, and becauseof the thorough fusing of all the parts during the baking process theblock is a good resistant of heat.

If it is desired to produce a block which is very refractory, the redclay may be dispensed with and a larger amount of fire clay used, and onthe other hand if the heat resisting quality of the block desired isimmaterial, the fire clay may be dispensed with and a larger amount ofred clay used.

It will, ofcourse, be understood that the proportions of the variousingredients may be varied'greatly from those above stated, Withoutdeparting from the scope or spirit of the invention as claimed.

Having thusdescribed my invention what ll claim is A process formanufacturing building ,blocks by mixing 20 parts of pulverized granite,10 parts of pulverized glass, 35 parts of red clay, 35 parts of fireclay and bicarbonate of soda in an amount equaling 1 per cent. of theentire mixture, and fusing the entire mixture by means of a hightemperatore.

his SEBASTIANO X RANNO ru 13111010. mark I

